What is this?
Alveolar sacs are tiny clusters of air sacs found deep inside your lungs, looking a bit like a bunch of grapes. Their super important job is to help your body take in oxygen from the air you breathe and get rid of carbon dioxide.
Key Parts to Explore
Alveolus
This is a single, tiny, balloon-like air sac where oxygen enters your blood and carbon dioxide leaves.
Alveolar Sac
This is the entire cluster of many tiny air sacs, like a small bunch of grapes at the end of an airway.
Bronchiole
This is the very small air tube that carries air from your larger lung tubes directly to the alveolar sacs.
Capillaries
These are super-thin blood vessels that tightly wrap around each alveolus to exchange gases with your blood.
Did You Know?
If you flattened out all the alveolar sacs in your lungs, they would cover an area about the size of a tennis court!
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